From: Eric Auger <eric.auger@redhat.com>
To: eric.auger@redhat.com, eric.auger.pro@gmail.com,
christoffer.dall@linaro.org, marc.zyngier@arm.com,
robin.murphy@arm.com, alex.williamson@redhat.com,
will.deacon@arm.com, joro@8bytes.org, tglx@linutronix.de,
jason@lakedaemon.net, linux-arm-kernel@lists.infradead.org
Cc: kvm@vger.kernel.org, drjones@redhat.com,
linux-kernel@vger.kernel.org, Bharat.Bhushan@freescale.com,
pranav.sawargaonkar@gmail.com, p.fedin@samsung.com,
iommu@lists.linux-foundation.org, Jean-Philippe.Brucker@arm.com,
yehuday@marvell.com, Manish.Jaggi@caviumnetworks.com
Subject: [RFC 08/11] vfio/type1: Sets the IOVA window in case MSI IOVA need to be allocated
Date: Tue, 27 Sep 2016 20:48:35 +0000 [thread overview]
Message-ID: <1475009318-2617-9-git-send-email-eric.auger@redhat.com> (raw)
In-Reply-To: <1475009318-2617-1-git-send-email-eric.auger@redhat.com>
In case the IOMMU translates MSI, MSI IOVA will need to be transparently
allocated by the kernel in unused GPA space. Let's initialize a DMA domain
where some slots will be reserved "unmanaged" slots and rest is left
available for IOVA allocation.
Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
drivers/vfio/vfio_iommu_type1.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
index 2ba1942..ad08fd0 100644
--- a/drivers/vfio/vfio_iommu_type1.c
+++ b/drivers/vfio/vfio_iommu_type1.c
@@ -36,6 +36,7 @@
#include <linux/uaccess.h>
#include <linux/vfio.h>
#include <linux/workqueue.h>
+#include <linux/dma-iommu.h>
#define DRIVER_VERSION "0.2"
#define DRIVER_AUTHOR "Alex Williamson <alex.williamson@redhat.com>"
@@ -829,6 +830,11 @@ static int vfio_iommu_type1_attach_group(void *iommu_data,
vfio_test_domain_fgsp(domain);
+ /* sets the IOVA window */
+ if (iommu_capable(bus, IOMMU_CAP_TRANSLATE_MSI) &&
+ iommu_get_dma_msi_region_cookie(domain->domain, 0, ULONG_MAX))
+ goto out_detach;
+
/* replay mappings on new domains */
ret = vfio_iommu_replay(iommu, domain);
if (ret)
--
1.9.1
WARNING: multiple messages have this Message-ID (diff)
From: Eric Auger <eric.auger-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: eric.auger-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
eric.auger.pro-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
christoffer.dall-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org,
marc.zyngier-5wv7dgnIgG8@public.gmane.org,
robin.murphy-5wv7dgnIgG8@public.gmane.org,
alex.williamson-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
will.deacon-5wv7dgnIgG8@public.gmane.org,
joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org,
tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org,
jason-NLaQJdtUoK4Be96aLqz0jA@public.gmane.org,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Cc: drjones-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
kvm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Manish.Jaggi-M3mlKVOIwJVv6pq1l3V1OdBPR1lH4CV8@public.gmane.org,
p.fedin-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
pranav.sawargaonkar-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
yehuday-eYqpPyKDWXRBDgjK7y7TUQ@public.gmane.org
Subject: [RFC 08/11] vfio/type1: Sets the IOVA window in case MSI IOVA need to be allocated
Date: Tue, 27 Sep 2016 20:48:35 +0000 [thread overview]
Message-ID: <1475009318-2617-9-git-send-email-eric.auger@redhat.com> (raw)
In-Reply-To: <1475009318-2617-1-git-send-email-eric.auger-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
In case the IOMMU translates MSI, MSI IOVA will need to be transparently
allocated by the kernel in unused GPA space. Let's initialize a DMA domain
where some slots will be reserved "unmanaged" slots and rest is left
available for IOVA allocation.
Signed-off-by: Eric Auger <eric.auger-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
---
drivers/vfio/vfio_iommu_type1.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
index 2ba1942..ad08fd0 100644
--- a/drivers/vfio/vfio_iommu_type1.c
+++ b/drivers/vfio/vfio_iommu_type1.c
@@ -36,6 +36,7 @@
#include <linux/uaccess.h>
#include <linux/vfio.h>
#include <linux/workqueue.h>
+#include <linux/dma-iommu.h>
#define DRIVER_VERSION "0.2"
#define DRIVER_AUTHOR "Alex Williamson <alex.williamson-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>"
@@ -829,6 +830,11 @@ static int vfio_iommu_type1_attach_group(void *iommu_data,
vfio_test_domain_fgsp(domain);
+ /* sets the IOVA window */
+ if (iommu_capable(bus, IOMMU_CAP_TRANSLATE_MSI) &&
+ iommu_get_dma_msi_region_cookie(domain->domain, 0, ULONG_MAX))
+ goto out_detach;
+
/* replay mappings on new domains */
ret = vfio_iommu_replay(iommu, domain);
if (ret)
--
1.9.1
next prev parent reply other threads:[~2016-09-27 20:49 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-27 20:48 [RFC 00/11] KVM PCIe/MSI passthrough on ARM/ARM64: re-design with transparent MSI mapping Eric Auger
2016-09-27 20:48 ` Eric Auger
2016-09-27 20:48 ` Eric Auger
2016-09-27 20:48 ` [RFC 01/11] iommu: Add iommu_domain_msi_geometry and DOMAIN_ATTR_MSI_GEOMETRY Eric Auger
2016-09-27 20:48 ` Eric Auger
2016-09-27 20:48 ` [RFC 02/11] iommu: Introduce IOMMU_CAP_TRANSLATE_MSI capability Eric Auger
2016-09-27 20:48 ` Eric Auger
2016-09-27 20:48 ` [RFC 03/11] iommu: Introduce IOMMU_DOMAIN_MIXED Eric Auger
2016-09-27 20:48 ` Eric Auger
2016-09-27 20:48 ` [RFC 04/11] iommu/dma: Allow MSI-only cookies Eric Auger
2016-09-27 20:48 ` Eric Auger
2016-09-27 20:48 ` [RFC 05/11] iommu/dma: iommu_dma_(un)map_mixed Eric Auger
2016-09-27 20:48 ` Eric Auger
2016-09-30 13:24 ` Robin Murphy
2016-09-30 13:24 ` Robin Murphy
2016-09-30 13:24 ` Robin Murphy
2016-10-02 9:56 ` Christoffer Dall
2016-10-02 9:56 ` Christoffer Dall
2016-10-02 9:56 ` Christoffer Dall
2016-10-04 17:18 ` Robin Murphy
2016-10-04 17:18 ` Robin Murphy
2016-10-04 17:37 ` Auger Eric
2016-10-04 17:37 ` Auger Eric
2016-10-03 9:38 ` Auger Eric
2016-10-03 9:38 ` Auger Eric
2016-10-03 9:38 ` Auger Eric
2016-09-27 20:48 ` [RFC 06/11] iommu/arm-smmu: Allow IOMMU_DOMAIN_MIXED domain allocation Eric Auger
2016-09-27 20:48 ` Eric Auger
2016-09-27 20:48 ` [RFC 07/11] iommu: Use IOMMU_DOMAIN_MIXED typed domain when IOMMU translates MSI Eric Auger
2016-09-27 20:48 ` Eric Auger
2016-09-27 20:48 ` Eric Auger [this message]
2016-09-27 20:48 ` [RFC 08/11] vfio/type1: Sets the IOVA window in case MSI IOVA need to be allocated Eric Auger
2016-09-27 20:48 ` [RFC 09/11] vfio/type1: Reserve IOVAs for IOMMU_DOMAIN_MIXED domains Eric Auger
2016-09-27 20:48 ` Eric Auger
2016-09-27 20:48 ` [RFC 10/11] iommu/arm-smmu: Do not advertise IOMMU_CAP_INTR_REMAP Eric Auger
2016-09-27 20:48 ` Eric Auger
2016-09-27 20:48 ` [RFC 11/11] iommu/arm-smmu: Advertise IOMMU_CAP_TRANSLATE_MSI Eric Auger
2016-09-27 20:48 ` Eric Auger
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